Process for the insulation of electric wires and cables.



PATENTED JULY 30 I F. M. GHAPLET. PROCESS FOR THE INSULATION 0F ELECTRIC WIRES AND CABLES.

APPLICATION FILED MAY 4,1905.

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F. M. GHABLET. I PROGBSS'POR THE INSULATION 0F ELECTRIC WIRES AND CABLES.

APPLIOA'IION FILED MAY 4,1905.

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Svweutoz ees FREDERIO MARIE CHAPLET, OF LAVAL, FRANCE, ASSIGNOR TO LA COMPAGNIE TRANQAISFI DE LAMIANTE DU CAP, OF PARIS, FRANCE.

PROCESS FOR THE INSULATION OF ELECTRIC WIRES AND CABLES.

Specification of Letters Patent.

Patented July 30, 1907,

Application filed May 4,1905. Serial No. 258,839.

To all whom it may concern:

Be it known that I, Fniivnmc lVlARIE CHAPLET, a citizen of the Republic of France, and-a resident of Laval, France, have invented a new and useful novel Process for the Insulation of Electric Wires and Cables, which'process is fully set forth in the following specification.

The present invention is an improved process of insulating electric wires and cables, which consists broadly in the superposition to the desired thickness of layers of fibrous materials, such as cotton, silk, as bestos, ete., each of said layers being applied parallel to and longitudinally of the wire or cable and separately closed around and smoothed thereon.

The method of applying the insulation parallel rather than spirally to the wire results in very pronounced advantages in the finished product. In the process of taping or winding the insulation spirally, the spirals overlap one another upon the wire, resulting in an irregular insulating envelop or covering,

while in the present process of applying the insulation parallel to the wire in thin layers and compacting each layer as it is applied, this undesirable result is obviated, and a uniform, smooth, dense, compact and adhering insulating coating or covering is attained.

The invention will be better understood by reference to the accompanying drawings, wherein- I Figure 1 is a diagrammatic view of an apparatus for carrying out the'improved process; Fig. 2'is a similar view at'right angles to Fig. 1; and Figs. 3 and 4 are details of the smoothing or felting device.

Referring to the drawings, a is a drum on which are wound the wires or cables to be insulated, six wires being herein shown as so wound, and being numbered from l;6, respectively. As it is obvious that the operation for insulating. is the same for each of the wires, it will be sufficient to refer only to, for example, wire 1. On leaving drum a wire 1 passes over a roller b and in front of a roll 0 over which latter passes a plurality of ribbons or layers, ten being shown in the drawings, though of course the number may be varied according to the thickness of insulation dosired.- These ribbons or layers pass to the wires to be insulated from dividing drums f and 9 (Fig. 2) and if, for example, it

be desired to simultaneously apply to each of six wires ten layers or ribbons of insulating material, it-is obvious that sixty ribbons or layers must be suitably grouped for this purpose. When, now, wire 1 passes along parallel to roller 0, the first layer or ribbon begins to be applied thereto, and the first of a series 01' smoothing devices ta smoothing device being supplied for each ribbon or layer of insulating material applied to each wire) felts the sliver or layer and closes the same longitudinally about the wire.

As shown in Figs. 3 and 4, each of these smoothing -or felting devices consists, essentially, of a pulley 7 suitably supported, as by collars 8 and 9, rotary rnove ment being applied to said pulley by means of cable 10. Pivot-ally mounted on pins 11 and 12, and arranged inside the pulley, are plates 13 and 14 which are pressed against the wire or cable 1 by means of springs 15, as shown. The rubbing of the fibers of the layer or sliver against the plates effects the felting.

Upon this first layer or sliver d, which has been felted and closed around the wire by device 0, is applied the second ribbon or layer d which latter is [cited by the smoothing device c and so on up to the last layer, the wire thus enveloped or covered being then wound upon a drum h.

As has been before stated, the same operation is taking place with wires 2, 3, 4, 5 and 6, which latter when covered with the insulated coating are likewise FREDERIC, MARIE CI-IAPLET.

Witnesses EMILE Lno'rmc'r, HANSON C. Conn. 

